"We’ve interviewed dozens of candidates this cycle, but few are as passionate and articulate in defense of restoring our Republic as Dr. Milton Wolf," Madison Project chairman and former Rep. Jim Ryun (R-KS) said in a statement on Thursday. "Even though he has never held public office, Dr. Wolf has exhibited a command of the issues and a dedication to conservative values that is lacking among most individuals in Washington. Senator Roberts has served admirably for a number of decades, but if we ever hope to rebuild the Senate majority on a solid conservative foundation, we need fewer career politicians and more citizen leaders like Milton Wolf."

The Madison Project's endorsement of Wolf is the second endorsement he's received from a prominent conservative outside group in about a week. TPM was first to report that the Senate Conservatives Fund endorsed Wolf earlier this month.

Wolf, a radiologist, happens to be President Barack Obama's second cousin. Ryun said that Wolf would be one of the "loudest" opponents of Obamacare if elected to the Senate.

"Milton will continue to fight for us every day of every year he is in office, which, as promised, will be no longer than two terms. In particular, he will be one of the U.S. Senate’s loudest voices against Obamacare," Ryun said.